4 pairs People Socks Mens Lightweight Merino Running socks wool 4 Pairs. Made in USA 55% Merino wool ,20% Nylon, 20% Poly,5% Spandex Fits Mens Shoe size 7-11 . Womens shoe size 7+ Merino Wool/nylon blend is itch-free and maintains durability for the lifetime of the socks Lightweight Merino Wool cushioning for extra comfort without bulk.